CVE-2026-77481: Microsoft SQL Server 2017

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

Affected products

• Microsoft SQL Server 2017: before 14.0.2130.4 (fixed in 14.0.2130.4); from 14.0.3006.16, before 14.0.3550.4 (fixed in 14.0.3550.4)
• Microsoft SQL Server 2019: before 15.0.2190.7 (fixed in 15.0.2190.7); from 15.0.4003.23, before 15.0.4490.9 (fixed in 15.0.4490.9)
• Microsoft SQL Server 2022: before 16.0.1200.5 (fixed in 16.0.1200.5); from 16.0.4003.1, before 16.0.4275.2 (fixed in 16.0.4275.2)
• Microsoft SQL Server 2025: before 17.0.1135.8 (fixed in 17.0.1135.8); from 17.0.4006.2, before 17.0.4085.5 (fixed in 17.0.4085.5)

Published 2026-09-08. Last modified 2026-09-15.